☆程序说明：☆The.NETPetShopapplicationisdesignedtoshowthebestpracticesforbuildingenterprise,n-tier.NET2.0applicationsthatmayneedtosupportavarietyofdatabaseplatformsanddeploymentscenarios.☆分层结构：☆PetShop.BLLPetShop.CacheDependencyFactoryPetShop.DALFactoryPetShop.DBUtilityPetShop.IBLLStrategyPetS